An equivalent accelerated life test system for lubricating oil pumps

Abstract

The present invention belongs to the technical field of lubricating oil pump testing, and particularly relates to an equivalent accelerated life test system for a lubricating oil pump, comprising a lubricating oil pump (1) and a lubricating oil tank (2), wherein the inlet of the boosting stage of the lubricating oil pump (1) is connected to the outlet of the lubricating oil tank (2), the boosting stage of the lubricating oil pump (1) extracts lubricating oil from the lubricating oil tank (2), the outlet of the boosting stage of the lubricating oil pump (1) is respectively connected to a plurality of secondary nozzles (3) through a pipeline, each secondary nozzle (3) is correspondingly connected to an oil-gas mixing tank (4), the lubricating oil enters the oil return stage of the lubricating oil pump (1) through the oil-gas mixing tank (4), and the oil return port of the lubricating oil pump (1) is connected to the lubricating oil tank (2) through a pipeline. The present invention can realistically simulate the working state of the lubricating oil pump boosting stage extracting lubricating oil and distributing it to each lubrication point, and the oil return stage extracting oil-gas mixture from each lubrication point, and at the same time, through the equivalent accelerated test method, greatly reduce the time of the lubricating oil pump life test.

Description

Technical Field

[0001] The invention belongs to the technical field of lubricating oil pump testing, and in particular relates to a lubricating oil pump equivalent accelerated life test system. Background Art

[0002] The lubricating oil pump group is the core component of the lubrication system. Its functions are mainly in two aspects. On the one hand, it is to pressurize the lubricating oil in the lubricating oil tank through the lubricating oil pump and then transport it to the various lubrication points of the mechanical parts; on the other hand, it is to pump the lubricating oil that has been pressurized and transported to the various lubricating points for lubrication and cooling back to the lubricating oil tank. According to the working principle of the lubricating oil pump group, the pressurization stage generally extracts lubricating oil from the lubricating oil tank. The lubricating oil extracted by this stage of pump is usually in a pure oil state. After the lubricating oil is extracted, it is transported to various lubricating parts and sprayed onto mechanical parts that need cooling, such as gears, through the oil nozzle. This part of the lubricating oil is usually in an oil-gas mixture state after lubrication and cooling. The oil-gas mixture is pumped back to the lubricating oil tank through the various return oil stages of the lubricating oil pump.

[0003] Currently, lubricating oil pumps are typically required to have a long lifespan and high reliability. Therefore, they usually need to undergo life tests of tens of thousands of hours before they are technically mature and can be applied to aircraft engines. However, existing lubricating oil pump equivalent accelerated life test equipment is usually only capable of extracting pure oil and cannot truly simulate the actual operating conditions of the lubricating oil pump's return oil stage to extract oil and gas. In addition, the existing test equipment takes a long time to conduct lubricating oil pump equivalent accelerated life tests, which is time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of the present invention is to provide an equivalent accelerated life test system for a lubricating oil pump, which can realistically simulate the working state of the lubricating oil pump's booster stage extracting lubricating oil and distributing it to each lubrication point, and the oil return stage extracting oil-gas mixture from each lubrication point. At the same time, through the equivalent accelerated test method, the time of the lubricating oil pump life test is greatly reduced.

[0005] Technical solution of the present invention

[0006] A lubricating oil pump equivalent accelerated life test system includes a lubricating oil pump 1 and a lubricating oil tank 2. The boosting stage inlet of the lubricating oil pump 1 is connected to the outlet of the lubricating oil tank 2. The boosting stage of the lubricating oil pump 1 draws lubricating oil from the lubricating oil tank 2. The boosting stage outlet of the lubricating oil pump 1 is connected to a plurality of secondary nozzles 3 through a pipeline. Each secondary nozzle 3 is connected to an oil-air mixing tank 4. The lubricating oil enters the return oil stage of the lubricating oil pump 1 through the oil-air mixing tank 4. The return oil port of the lubricating oil pump 1 is connected to the lubricating oil tank 2 through a pipeline.

[0007] Furthermore, a boost stage pressure differential valve is provided on the lubricating oil pump 1, and the boost stage pressure differential valve is connected to the lubricating oil tank 2 through a pipeline to sense the oil pressure in the lubricating oil tank 2; the boost stage pressure differential valve is connected to the boost stage outlet of the lubricating oil pump 1 through another pipeline to sense the oil pressure at the boost stage outlet.

[0008] Furthermore, it also includes a first pressure gauge 9, which is arranged on the pipeline of the boosting stage outlet of the lubricating oil pump 1.

[0009] Furthermore, it also includes a valve 8, which is arranged on the pipeline of the boosting stage outlet of the lubricating oil pump 1, and the valve 8 is located at the rear end of the first pressure gauge 9.

[0010] Furthermore, it includes a second pressure gauge 7, which is arranged on the pipeline connecting the boosting stage outlet of the lubricating oil pump 1 and the secondary nozzle 3, and the second pressure gauge 7 is located at the rear end of the valve 8.

[0011] Furthermore, it includes an equivalent nozzle 6, which is arranged on the pipeline connecting the boosting stage outlet of the lubricating oil pump 1 and the secondary nozzle 3, and the equivalent nozzle 6 is located at the rear end of the second pressure gauge 7.

[0012] Furthermore, it also includes a flow meter 5, which is arranged on the pipeline connecting the boost stage outlet of the lubricating oil pump 1 and the secondary nozzle 3, and the equivalent flow meter 5 is located at the rear end of the equivalent nozzle 6.

[0013] Furthermore, the flow meter 5 is also connected to the lubricating oil tank 2 through a pipeline via a first-level nozzle.

[0014] Furthermore, a heating device is provided inside the oil-gas mixing box 4 .

[0015] Beneficial effects of the present invention:

[0016] This invention provides an equivalent accelerated life test system for lubricating oil pumps. It realistically simulates the pump's boost and return stages, pumping lubricating oil or an oil-air mixture, ensuring the test effectively reflects the pump's operating conditions. By employing appropriate testing methods, the system accelerates the life test of the lubricating oil pump, shortens testing time, and reduces testing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the equivalent accelerated life test system for lubricating oil pumps of the present invention;

[0018] Among them, 1 is the lubricating oil pump; 2 is the lubricating oil tank; 3 is the secondary nozzle; 4 is the oil-gas mixing tank; 5 is the flow meter; 6 is the equivalent nozzle; 7 is the second pressure gauge; 8 is the valve; 9 is the first pressure gauge. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0020] like Figure 1The figure shows an equivalent accelerated life test system for a lubricating oil pump according to the present invention, comprising a lubricating oil pump 1 and a lubricating oil tank 2. The inlet of the boosting stage of the lubricating oil pump 1 is connected to the outlet of the lubricating oil tank 2. The boosting stage of the lubricating oil pump 1 draws lubricating oil from the lubricating oil tank 2. The outlet of the boosting stage of the lubricating oil pump 1 is connected to a plurality of secondary nozzles 3 via a pipeline. Each secondary nozzle 3 is connected to an oil-air mixing tank 4. The lubricating oil enters the return oil stage of the lubricating oil pump 1 through the oil-air mixing tank 4. The return oil port of the lubricating oil pump 1 is connected to the lubricating oil tank 2 via a pipeline.

[0021] In this embodiment, the lubricating oil pump 1 is provided with a boost stage pressure differential valve, which is connected to the lubricating oil tank 2 through a pipeline to sense the oil pressure in the lubricating oil tank; the boost stage pressure differential valve is connected to the boost stage outlet of the lubricating oil pump 1 through another pipeline to sense the oil pressure at the boost stage outlet. ； The differential pressure valve senses the difference between the boost stage outlet pressure and the oil pressure in the tank. This constant pressure difference ensures a stable oil supply pressure for the lubrication system. Regardless of how the tank pressure changes (mainly due to changes in the working altitude), this difference is always kept constant, further stabilizing the system.

[0022] In this embodiment, a first pressure gauge 9 is further included, which is arranged on the pipeline of the boost stage outlet of the lubricating oil pump 1; the function of the pressure gauge 9 is to monitor the boost stage outlet pressure of the lubricating oil pump to ensure that the boost stage outlet pressure of the lubricating oil pump is in a monitored state during the entire test process.

[0023] In this embodiment, valve 8 is further included. Valve 8 is disposed on the pipeline at the outlet of the boost stage of lubricating oil pump 1 and is located behind first pressure gauge 9. Valve 8 ensures that the outlet pressure of the boost stage meets the specified value and regulates the pressure when the outlet pressure is too high or too low.

[0024] In this embodiment, a second pressure gauge 7 is also included. The second pressure gauge 7 is installed in the pipeline connecting the boost stage outlet of the lubricating oil pump 1 and the secondary nozzle 3, and the second pressure gauge 7 is located behind the valve 8. The function of the pressure gauge 7 is to monitor the oil supply pressure of the system to maintain a specified pressure value.

[0025] In this embodiment, an equivalent nozzle 6 is also included. This nozzle 6 is located in the pipeline connecting the booster stage outlet of the lubricating oil pump 1 and the secondary nozzle 3, and is positioned behind the second pressure gauge 7. The nozzle 6 has an adjustable equivalent cross-section and is used to regulate the system's pressure and flow to the specified desired values.

[0026] In this embodiment, a flow meter 5 is also included. The flow meter 5 is installed in the pipeline connecting the boost stage outlet of the lubricating oil pump 1 and the secondary nozzle 3, and the equivalent flow meter 5 is located behind the equivalent nozzle 6. The function of the flow meter 5 is to monitor the lubricating oil supply of the system to meet the specified flow value.

[0027] In this embodiment, the flow meter 5 is also connected to the lubricating oil tank 2 via a pipeline through a main nozzle.

[0028] In this embodiment, a heating device is provided inside the oil-gas mixing tank 4. This heating device can be a device similar to an electric heater that can heat the oil-gas mixture. Its main function is to heat the oil-gas mixture entering each oil return stage of the oil pump to meet the required oil return temperature, as the oil return stage of the oil pump generally requires a relatively high oil return temperature.

[0029] Another embodiment of the present invention is:

[0030] A lubricating oil pump equivalent acceleration method is provided, which includes building a test device that truly simulates the working state of the lubricating oil pump and calculating appropriate working conditions such as speed, temperature and pressure. Under the premise of simulating the actual working state of the lubricating oil pump, the life test of the lubricating oil pump is effectively accelerated, ensuring the authenticity and accuracy of the equivalent accelerated life test of the lubricating oil pump.

[0031] The test rig, simulating the operating state of the oil pump, consists of an oil tank 2, a secondary nozzle 3, an oil-air mixing tank 4 with heating capabilities, a flowmeter 5, a stoichiometric nozzle 6, a second pressure gauge 7, a valve 8, and a first pressure gauge 9. After the oil pump 1 is started, its booster stage draws oil through the oil tank 2. The oil, pressurized by the booster stage, is regulated by pressure gauge 9, valve 8, pressure gauge 2, and stoichiometric nozzle 6 to ensure that the oil entering the lubrication system meets system requirements. The flowmeter 5 constantly monitors the system's oil supply.

[0032] The lubricating oil with appropriate flow detected by the flow meter 5 is adjusted through the secondary nozzle 3 and then enters different oil-gas mixing tanks 4 with heating capacity according to different flow rates. The lubricating oil and air in the oil-gas mixing tank 4 are fully mixed to form an oil-gas mixture. The oil return stages of the lubricating oil pump 1 extract the oil-gas mixture and flow it back to the lubricating oil tank 2 through the total oil return port. The excess lubricating oil in the system (that is, the part of the lubricating oil in the lubrication system that does not return through the lubricating oil pump 1) is adjusted through the primary nozzle and then directly returned to the lubricating oil tank 2.

[0033] After the test device is determined, each nozzle in the device is calibrated under the rated state to solidify the test state of the test device.

[0034] According to the actual working conditions of the lubricating oil pump, the working time and working temperature at different speeds are determined. On this basis, the switching conditions of different working conditions under equivalent acceleration conditions are calculated to accelerate the life test of the lubricating oil pump.

[0035] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A lubricating oil pump equivalent accelerated life test system, comprising a lubricating oil pump (1), characterized in that: It also includes a lubricating oil tank (2), wherein the boosting stage inlet of the lubricating oil pump (1) is connected to the outlet of the lubricating oil tank (2), the boosting stage of the lubricating oil pump (1) extracts lubricating oil from the lubricating oil tank (2), the boosting stage outlet of the lubricating oil pump (1) is connected to a plurality of secondary nozzles (3) through a pipeline, each secondary nozzle (3) is connected to an oil-gas mixing tank (4), and the lubricating oil enters the oil return stage of the lubricating oil pump (1) through the oil-gas mixing tank (4), and the oil return port of the lubricating oil pump (1) is connected to the lubricating oil tank (2) through a pipeline; After the lubricating oil pump (1) is started, the boosting stage of the lubricating oil pump (1) draws lubricating oil through the lubricating oil tank (2). The lubricating oil pressurized by the boosting stage is regulated by the first pressure gauge (9), the valve (8), the second pressure gauge (7), and the equivalent nozzle (6) to ensure that the lubricating oil entering the lubrication system meets the system's needs. The flow meter (5) is used to constantly monitor the supply of lubricating oil to the system. After the flow rate of the lubricating oil is detected by the flow meter (5), it is adjusted through the secondary nozzle (3) and enters different oil-air mixing boxes (4) with heating capabilities according to different flow rates. The lubricating oil and air in the oil-air mixing box (4) are fully mixed to form an oil-air mixture. The oil return stages of the lubricating oil pump (1) extract the oil-air mixture and return it to the lubricating oil tank (2) through the main oil return port.

2. The lubricating oil pump equivalent accelerated life test system according to claim 1, characterized in that: The lubricating oil pump (1) is provided with a boost stage pressure differential valve, which is connected to the lubricating oil tank (2) through a pipeline to sense the oil pressure in the lubricating oil tank (2); the boost stage pressure differential valve is connected to the boost stage outlet of the lubricating oil pump (1) through another pipeline to sense the oil pressure at the boost stage outlet.

3. The lubricating oil pump equivalent accelerated life test system according to claim 1, characterized in that: It also includes a first pressure gauge (9), which is arranged on the pipeline at the outlet of the boosting stage of the lubricating oil pump (1).

4. The lubricating oil pump equivalent accelerated life test system according to claim 3, characterized in that: It also includes a valve (8), which is arranged on the pipeline of the boosting stage outlet of the lubricating oil pump (1), and the valve (8) is located at the rear end of the first pressure gauge (9).

5. The lubricating oil pump equivalent accelerated life test system according to claim 4, characterized in that: It also includes a second pressure gauge (7), which is arranged on a pipeline connecting the boosting stage outlet of the lubricating oil pump (1) and the secondary nozzle (3), and the second pressure gauge (7) is located at the rear end of the valve (8).

6. The lubricating oil pump equivalent accelerated life test system according to claim 5, characterized in that: It also includes an equivalent nozzle (6), which is arranged on a pipeline connecting the boosting stage outlet of the lubricating oil pump (1) and the secondary nozzle (3), and the equivalent nozzle (6) is located at the rear end of the second pressure gauge (7).

7. The lubricating oil pump equivalent accelerated life test system according to claim 6, characterized in that: It also includes a flow meter (5), which is arranged on a pipeline connecting the boosting stage outlet of the lubricating oil pump (1) and the secondary nozzle (3), and the equivalent flow meter (5) is located at the rear end of the equivalent nozzle (6).

8. The lubricating oil pump equivalent accelerated life test system according to claim 7, characterized in that: The flow meter (5) is also connected to the lubricating oil tank (2) via a pipeline through a first-stage nozzle.

9. The lubricating oil pump equivalent accelerated life test system according to claim 1, characterized in that: A heating device is provided inside the oil-gas mixing box (4).

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